Section 1.4
Extension Exercise
p. 19
The Electromagnetic Spectrum
¾ Additional Practice
6.(c) How do sunscreen lotions
protect individuals from these harmful rays? Present your research
in paragraph form. |
| The
Effects of Sunblock
This educational page provides information
on the various mechanisms of sun blockers. Another PhysLink
page gives the wavelengths and frequency of various types of UV
radiation . |
| Clothing,
Sunscreens, UV Light and Cancer
This page discusses the efficacy of various
treatments of T-shirt fabric in reducing the amount of UV radiation
reaching the skin . |
| Active
Ingredients of Sunscreens
This article from the Chemical and Engineering
News details the various kinds of sunblocks available, and how
they work. |
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7. With their eyes, humans can detect electromagnetic
energy with wavelengths between 400 nm and 700 nm. This range
represents the visible spectrum. People who are unable to see
all the wavelengths in this range are deemed colourblind. Research
why people who are colourblind are unable to see all the colours
in the visible spectrum. Summarize your research in paragraph
form. |
| What
Is Colorblindness and the Different Types?
This optometrist-designed
U.S. page describes the different kinds and degrees of deficiencies
in colour vision. |
| How
Do Things Look to Colorblind People?
This page describes and illustrates how things look to people
withvarious kinds and degrees of colourblindness. |
| Colorblindness
Information Page
This page provides information on the reason
for colorblindness, and describes (with a colourblindness test
chart) the most common colour perception problem. It also provides
links to articles written by colourblind individuals, on how this
challenge affects their lives. |
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Section 1.5
Activity
p. 21
Identifying Gases
Using Line Spectra
(j) The second most abundant element
in the universe is helium. Helium was discovered in 1868 using
line spectroscopy. Describe how helium was discovered. Write a
short paragraph, outlining your findings. |
| An
Element of Interest.Helium
This page describes the
characteristics of helium, and how it was discovered. Also included
is an article written for helium's hundredth anniversary. |
| Periodic
Table: Helium
This page describes helium;
its history, sources, cost, properties, isotopes, and uses. |
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(k) " Neon " lights are produced by filling
a glass tube with a specific gas and then passing electricity
through the glass tube. Research which gases produce which colours
in "neon" lights. |
| Making
Colours With Neon
This page explains how
to make different coloured lights with the inert gases argon and
neon. |
| How
Do Neon Lights Work?
A Physics professor at
Syracuse University provides an explanation on how neon lights
work . |
| A
Few Facts About Neon
This page, produced by a sign company,
provides a general description of the use of neon and other gases
for signage, followed by a series of specific questions and answers
about neon. |
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Section
1.7 Activity
p. 30
Flame Tests
(h) Flame emission spectroscopy is a technique that is
used to identify the components of different types of matter.
Using electronic and print resources, compile a list of situations
in which flame emission spectroscopy is used. |
| Flame
Emission Spectroscopy
This page explains the
chemistry behind flame emission spectroscopy and also includes
an experiment for analyzing samples for small amounts of potassium
using flame emission spectroscopy. |
| Spectroscopy:
Element Identification and Emission Spectra
This lab assignment
explains how flame emission spectroscopy works and reviews the
definition of terms and properties of light. Also provided are
links to Arizona University and Colorado State University's pages
on emission spectra. |
| Atomic
Emission Spectroscopy
This article, from the Journal of Chemical
Education, explains why this technique is still so widely used,
even decades after its initial discovery, and outlines some of
the analyses for which flame emission spectroscopy is the technique
of choice. |
| Flame
Photometric Determination of Sodium
The background of this lab report, produced
by researchers at the University of Kentucky's Department of Chemistry,
outlines some of the most popular uses of flame emission spectroscopy. |
| Mechanical
and Industrial Engineering Researcher
A professor at the University of Illinois
outlines his field of research, including an industrial application
of flame emission spectroscopy. |
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Section
1.9 Extension Exercise
p. 36
Tech Connect: Detecting
Counterfeit Canadian Currency—Extra Challenge
Watch the multimedia
presentation on currency education found at the Bank of Canada
Web site. |
| Bank
of Canada Multimedia Presentation
Select either the English
or French version of this presentation on detecting counterfeit
bills. |
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5.
The Bank of Canada has placed features on new
Canadian banknotes that help people who are visually impaired
identifydifferent denominations of currency. List these features.
|
| About
Bank Notes: Accessibility Features for Blind and Visually Impaired
The four features that
assist visually impaired people to identify bank notes are outlined
in this Bank of Canada page.
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| New
Bank Note Series Provides Canadians Improved Accessibility
The Canadian National
Institute for the Blind has produced a web page outlining the
features that make banknotes identifiable. |
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